Update release number

Author: SvenKlaassen

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "DoubleML"
-version = "0.10.dev0"
+version = "0.9.2"
 description = "Double Machine Learning in Python"
 readme = {file = "README.md", content-type = "text/markdown"}
 authors = [